<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app"></div>
</body>
    <script src="https://unpkg.com/vue@next"></script>
    <script>
        const app = Vue.createApp({
            
               template:`
               <layout-demo v-slot="props"
               <div>{{props}} </div>
              </layout-demo>
              <layout-demo v-slot="{item}"
               <div>{{item}} </div>
              </layout-demo>
               `
            })
            app.component('layout-demo',{
                data() {
                    return {
                      //  lists: [1,2,3]
                        lists: [
                            {title: 'A'},{title: 'B'},{title: 'C'}
                        ]
                    }
                },
                template:`
                <div>
                    <slot v-for="item in lists" :item="item"></slot>
                </div>
                `
            })
           app.mount("#app");
    </script>
</html>